A man travel a certain distance by train @ 25
km/hr and walk back @ 4 km/hr. The whole
journey took 5 hr 48 min, what distance did he
travel by train?
a)6/32 b)88/78 c)29/5 d)30/5
Answers
Answered by
0
Answer:
20 km
Let the distance be x km.
Total time = 5 hours 48 minutes
= 5+\frac{48}{60} = \left ( 5+\frac{4}{5} \right )hours
= \frac{29}{5}hours
\therefore \frac{x}{25}+\frac{x}{4} = \frac{29}{5}
=> \frac{4x+25x}{100} = \frac{29}{5}
=> 5\times 29x = 29\times 100
=> x = \frac{29\times 100}{5\times 29} = 20km.
Hence option [B] is the right answer
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